Impact: Guerra figures to fill a middle-relief role, as Jacob Petricka and Zach Putnam will likely be ahead of Guerra in the right-handed bullpen pecking order, behind closer David Robertson.

StatsLLC: Jan 15 / 12:00a ET

News: The White Sox have agreed to a $937,500, one-year deal with Guerra and avoided arbitration.

Impact: A 29-year-old right-hander, Guerra was 2-4 with a 2.91 ERA in 42 relief appearances last season - his first with Chicago. He made $511,000. Guerra also played for the Los Angeles Dodgers from 2011-13 and is 6-9 with a 2.91 ERA in 143 games.